Carboxymethyl cellulose CMC-Oil drilling
Petroleum grade CMC model: CMC - HV; CMC- LV ; CMC－LVT/LV; CMC－HVT
It has high water loss control ability, especially efficient fluid loss reducer. With low dosage, it can control water loss at a high level without affecting other properties of mud;
It has good temperature resistance and excellent salt resistance. It can still have good water loss reduction ability and certain rheology under a certain salt concentration. The viscosity is almost unchanged after dissolving in salt water. It is especially suitable for offshore drilling and deep wells;
It can well control the rheology of mud and has good thixotropy. It is suitable for any water-based mud in fresh water, seawater and saturated brine;
CMC-Application In Petroleum
1. The role of CMC in oil field is as follows:
- The CMC can reduce the water loss of the well wall and reduce the permeability of the mud;
- After adding CMC into the mud, the drilling rig can obtain low initial shear force, so that the mud is easy to release the gas wrapped in it, and the debris can be quickly discarded in the mud pit;
- Like other suspended dispersions, drilling mud has a certain existence period, which can be stabilized and extended after CMC.
2. CMC has the following excellent performance in oilfield application:
- High substitution degree, good substitution uniformity, high viscosity and low dosage, which can effectively improve the service efficiency of mud;
- Good moisture resistance, salt resistance and alkali resistance, suitable for fresh water, seawater and saturated brine water-based mud;
- The mud cake formed is of good quality and stable, which can effectively stabilize the soft soil
- It is suitable for mud systems with difficult solid content control and wide variation range.
Detail Parameters
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Addition amount (%) |
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Drilling treatment agent |
0.4-0.6% |
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If you need to customize, you can provide detailed formula and process. |
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Indicators |
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| CMC-HV | CMC-LV | |
| Color | White or light yellow powder | White or light yellow
Powder or particle |
| water content | 10.0% | 10.0% |
| PH | 7.5-9.5 | 7.5-9.5 |
| Degree of substitution | 0.70 | 0.80 |
| Purity | 65% | 60% |
| CMC meets American API-13A standard | CMC－LVT/LV | CMC－HVT | CMC－HV | |
| 600r / min reading | In fresh water | ≤90 | ≥30 | ≥50 |
| 4% brine | ≥30 | ≥50 | ||
| Saturated brine | ≥30 | ≥50 | ||
| Filtration loss (API), ML | ≤90 | ≥30 | ≤8 | |
